摘要
第二类换元法是一种既重要又不易掌握的积分方法。经过多年探索,发现第二类换元法也并非无规律可循,它也存在一定的规律性。一般可以用三角代换法、根式代换法、繁式代换法等三种代换法求出积分。
The second method of transformation is an important but not-easy-to-master calculus method.Through many years' research,the author have found its regular calculate pattern.By way of substituting the trigonometric function,substituting the radical,and substituting the complex formula,we can get the result of the calculs.
关键词
第二类换元法
三角代换法
根式代换法
繁式代换法
the second method of transformation
method of substituting the trigonometric function
method of substituting the radical
method of substituting the complex formula
